Roll for rolling mills



Dec. 25, 1923. 1,478,509

s. E. DIESCHER ROLL FOR ROLLING MILLS Filed Feb. 27, 1922 5 Sheets-Sheet1 IN YEN T01? Dec. 25 1923.

S. E. DIESCHER ROLL FOR ROLLING MILLS 5 Sheets-Sheet 2 Filed Feb. 2'71922 FIELEI- z a vmuq b tAzLJ- wlnresaas Dec. 25, 1923.

s. E. DIESCHER ROLL FOR ROLLING MILLS Filed Feb. 27. 1922 5 Sheets-Sheet3 INVENTOR WITNEGGES Dec. 25, 1923.

S. E. DIESCHER Filed Feb. 27 1922 5 Sheets-Sheet 4 Kg m Dec. 25 1923.1,478,509

s. E. DIESCHER ROLL FOR ROLLING MILLS Filed Feb. 27. 1922 5 Sheets-Sheet5v Fll3..11-

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Patented Dec. 25, 1923.

UNITED STATES 1,478,509 P TENT OFFICE.

SAMUEL E. DIESCHER, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOB TO S.DIESCHEB 6'0 SONS, A PARTNERSHIP OONSISTING OF SAMUEL S. DIESCHER ANDAUGUST P.

DIESCHER.

ROLL FOR ROLLING MILLS.

Application filed February 27, 1922. Serial No. 538,424.

To all whom it may concern:

Be it known that I, SAMUEL E. DIESCHER, residing at Wilkinsburg, in thecounty of Alleghen and State of Pennsylvania, a citizen 0 the UnitedStates, have invented or discovered certain new'and useful 1mprovementsin Rolls for" Rolling Mills, of which improvements the following is aspecification.

In continuous mills wherein a plurality of pairs of rolls are arrangedin tandem and spaced such distances apart that the rod, pipe, or otherarticle being rolled will be in the bite of two or more pairs of rollsat the same time, it is the practice to so proportion the rate ofrotation of the pairs of rolls that the pairs succeeding the entering orinitial air shall have a speed higher than that of t e precedin pairproportional to the reduction effecte in the preceding pair. If articlesto be rolled could be given the same degree of plasticity and eacharticle to have the same degree of plasticity throughout its entirelength, the adjustment of the rate of succeeding rolls might beaccomplished. In ractice, however, conditions on which plasticity isdependent such as temperature and composition of the metal article to berolled, vary to such an extent that only an approximate adjustment ofrate of rotation is made, and provision is made for permittin thearticle to loo out between airs of re s, or the rolls to SllP on theartic e. Both of these actions are undesirable for many reasons, and inorder to overcome them, rolls have been constructed with a positivelydriven body portion and an annulus rotatably mounted on the bod ortion,but adapted to be frictionally r1ven by the latter, the frictional enagement bein effected by clampin the s eeve between collars bearingagainst the ends of the sleeve and in positive engagement with the bodyportion. But on account of the constant wearing away of the contactingsurfaces of the sleeve, and collars, thus necessitatin a continualreadjustment of the collars, t is device was commercially impracticable.

The invention described herein has for its object the provision of meanswhereby an eflicient frictional driving connection may be establishedbetween the body portion of a roll and a reducing annulus looselymounted on the roll, and whereby wear between contacting surfaces of thebody portion and the annulus may be automatically compensated for. Theinvention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Fig.1 is a side elevation of aportion of a continuous mill embodying myimprovement; Fig. 2 is an end elevation of the same; Fig. 3 is asectional elevation on a plane coincident with the axes of the pair ofvertical rolls; Fig. 4 is a sectional view of an improved roll; Fig. 5is a plan of a portion of one of the journals of the roll shown in Fig.4; Fig. 6 is a transverse section on a plane indicated by the lines VIVIFig. 5; Fig. 7 is a view similar to Fig. 4 illustrating a modificationof the roll; Figs. 8 and 9 are transverse sections on planes indicatedby lines VII IVIII and IXIX Fig. 7 Fig. 10 is a detail View on anenlarged scale lllllS- trating the intercalating ribs on the roll bodyand reducing annulus; Fig. 11 is a sectional elevation illustrating afurther modification of the roll structure.

In the practice of the invention a mill employing the improved rollclaimed herein would consist of a plurality of stands A of horizontalrolls and a pluralit of stands B of vertical rolls alternating with thestands of horizontal rolls as shown in Figs. 1 and 2. In theconstruction shown the vertical rolls are driven from a common shaft 1through intermeshing bevel gears 2 and 3, the gears 2 being ke ed to theshaft 1 and the gears 3 to one o the pinion shafts 4 of each stand ofrolls the pinion shafts being connected to the necks of the rolls byspindles 5 in the usual or any suitable manner. The gear wheels 2 and 3of sucmessive stands of rolls are so connected that although the gears 2on the common driving shaft 1 are rotated at the same speed, the pinionsof successive roll stands and the rolls themselves will have a higherspeed, such increased speed being approximately proportional to theelongation of the article due to reduction effected in the recedin pairof rolls. The horizontal rols are iven from the common shaft 6 in thesame manner as the vertical rolls.

My improved roll consists of a body or supporting and driving portionsand an annular or reducing portion. The body ortion 7 is provided at itsends with use 3 8 and 9, the neck 9 being made of a. diameter shiftedalong the latter.

and length suitable for size of rolls employed and having at its end awabbler 10 or other suitable means for connection with the drivingspindle. The neck 8 is made of such diameter as to permit of thereducing annulus 11 being slid into operative relation to the bodyortion 7. The body portion 7 is provide with V-shaped peripheral ribs aand alternating grooves adapted to intermesh with correspondingly shapedgrooves and ribs 5 formed in the inner periphery of the annulus 11. Theannulus has an internal diameter measuring from the a ices of the ribssufficiently greater than t e external diameter of the body portion 7measuri from the apices of its ribs, to permit 0 the annulus being slidinto position around the body portion and shown in Figs. 4 and 7. Theannulus is held as against movement longitudinally of the body portionby a collar 12 on the body and a ring 13 on a sleeve 14 fitting aroundthe neck 8, and packing rings 15 formed of brass or other suitable metalare interposed between the annulus and the ring and collar to form atight joint to prevent the escape of lubricant from the interior of theannulus as hereinafter described and to prevent scale, etc. working inbetween the roll body and annulus. The sleeve 13 is secured to the neckin a manner to rotate therewith, but with fr'eedom to movelongitudinally in any suitable manner, and is shifted to hold theannulus in position by a nut 17 on the threaded portion of the neck 8 orextension thereof and-it is preferred that a spring 18 or resilientwasher 18 be interposed between the nut and the sleeve. Variousconstructions may be employed for so connecting the sleeve 14 with theneck that it will rotate with the neck and may be In the construe tionshown in Figs. 4, 5 and 6 the walls of the neck and sleeve are slottedin diametrically opposite sides, said slots 22 extending from the endsof the sleeve and neck and are adapted to receive radial lugs 23 on oneface of a rin 24 slidable along the tube 25 threaded into t e end of theneck 8. The engagement of these radial lugs with the slots in the sleeveand neck will lock those parts as against independent rotation, but willermit the sleeve to move longitudinally al dng the neck. The ring 24 ismade with an external diameter slightl less than the internal diameterof the s eeve, which extends over and beyond the ring as shown in Figs.5 and 6, and while not necessary it is preferred that ribs 26 be formedon the ring in alinement with the lugs 23 and extend into the slots inthe sleeve. The sleeve is adjusted and pushed along the neck by a nut 17screwing into the tube 25, the movement of the nut being preferablytransmitted to the sleeve by a spring 18 and a washer 29 1s made for alongitudina rovided with an annular rib 30 adapted to ear against theend of the sleeve.

In lieu of the construction shown in Figs. 4, 5 and 6, the engagement ofthe neck 8 with the sleeve 14 may be effected by a spline or key 16, asshown in Fi 7 and 8.

In order to supply lubricant to relatively movable surfaces, an axialpassage 19 extends thl'ough the neck 8 and a suitable distance into thebody portion, and branch passages 20 extend from the axial passagethrough the body 7 to supply lubricant to the surfaces of the annulusand body, and to the exterior surfaces of the neck 9 and to the surfacesof the sleeve 14 and neck 8. The lubricant may be fed through the axialpassage in any suitable manner, as for example, by charging thelubricant into an internally threaded shell 21 and screwing it onto theneck 8 as shown in Fig. 7. As the shell moves over the neck thelubricant will be forced therefrom and into the axial passage 19. Or thereceptacle for the lubricant may be formed by the tube 25 from which thelubricant is forced into the passage 19 and branch passages by a plug 31screwing into the tube as shown in Fig. 4.

In order to obtain maximum efficiency the surfaces of each of the ribs bon the annulus 11 should bear uniformly on the surfaces of adjacent ribsa on the body between which the annulus ribs project. In theconstruction shown the annulus is subjected to pressure tending to moveit longitudinally of the body portion of the roll, a wearing away of thebearing sufaces at the end of the annulus and of the collar 12 or washer15 would cause an unequal bearing of the surfaces of ribs 7) on thesurfaces of adjacent ribs a on the body portion. In order to prevent anysuch unequal bearing of the ribs on the annulus against surfaces ofadjacent ribs on the body Portion, provision movement of the annulus ora corresponding movement of the ribbed portion of the body of the roll.In the construction shown in Fig. 7 the ring is constructed to bearagainst a shoulder on the body of the roll, and the washers or packingrings 15 interposed between the ends of the annulus and the collar 12and ring 13 are made resilient thereby permitting the annulus to be somoved longitudinally of the body 7 as to ensure practically equalpressure of the surfaces of the ribs of the annulus against those on thebody 7.

The same uniformity of pressure of the ribs on one part against those ofthe other part can be attained by forming the ribs on a sleeve mountedon the roll body 7 in such manner as to rotate with the roll body and tomove freely longitudinally thereof. To

.this end the ribs 0; are formed on a sleeve 32 adapted to fit closelyaround the body portion 7' but capable of being shifted lon gitudinallyof the body, as shown in Fig. 11.

his sleeve is locked to the body so as to rotate therewith in anysuitable manner, as for example, by extending the key 16 employed forlocking the sleeve 14 to the neck 8 into ooves formed in adjacentsurfaces of the Eddy 7 and sleeve 16. The washers 15 inter osed betweenthe ends of the annulus an the collar 12 and ring 13 is made rigid ornonresilient so that the annulus will be held as against longitudinalmovement, the sleeve 32 being, however, made shorter than the distancebetween the collar 12 and ring 13, so that it may be moved longitudinalin case the-ribs a and I) do not properly intermesh.

The ribs a and b on the roll body and annulus are so constructed andproportioned that friction between their contacting surfaces will be duenot only to pressure acting radially, but also wedging action of theribs on one member between adjacent ribs on the other member.

And further, the contacting surfaces of the roll bodies and the annuliof a pair of rolls are so designed and constructed in accordance withrules known in the art that the frictional enga ement of the roll bodywith the annulus wi 1 be sufficient to operate the annulus to effect thereduction desired from such pair. In case the annuli encounter greaterresistance the roll body will continue to rotate their surfaces slidingalong the surfaces of the annuli.

It is the general practice in the operation of continuous mills thateach pair of rolls after the first pair are driven at higher speed thanthe precedin pair, such increase being proportional to t e rate ofelongation resulting from reduction in the previous pass. Theoretically,the peripheral speed of rolls following the first pair should exceed orbe greater than the rate of movement of the article as it comes from thebite of the receding rolls by an amount that 'PIOVldBS for taking in thelfnaterial at the exact speed of leaving the first pair of rolls. Assuch theoretical relations are not practically attainable, it is thepractice in certain applications of continuous mills in order to preventbending or looping out between rolls,

to give the succeeding pairs of rolls 21 peripheral speed approximatelyfive per cent more or less greater than the rate of move ment of thearticle from the (prefieding il'olls,

, t ere wi l )e When driven at such a spec of the roll on the article aconstant rubbin ll be subjected to undesirand the latter wi abletension. In the operation of a mill hav in rolls constructed as hereindescribed the re] of bodies ofsucceeding stands of rolls will be drivenat a higher speed than the movement of the article from the precedingstand, but the reducing annuli will not move any faster than the articlewith which it is in contact, as the roll bodies will slip on the annuli.There will be some tension on the article but only pro )ortional to thefriction between the roll bodies and the annuli. As the interiors of theannuli are charged with a lubricant there will be a minimum wear due tothesliding movement of the roll bodies on the annuli.

I claim herein as my invention:

1. A roll for'rolling mills having in'combination a body portion adaptedto be positively driven and having a peripherally ribbed surface and anannulus having an in ternal diameter greater than the external diameterof the body ortion and provided interiorly with ribs a apted tointercalate with the ribs on the body portion.

2. A roll for rolling mills having in combination a body adapted to bepositively driven and havinn a peripherally ribbed surface, an annulusbavin'g the internal diametergreater than the external diameter of thebody portion and provided interiorly with ribs adapted to intercalateinteriorly with the ribs on the body portion, one of said roll elementsbeing adapted to be shifted longitudinally by the other to ensureuniform pressure of the surfaces of the ribs of one element against thesurfaces of the ribs on the other element.

3. A roll for rolling mills having in combination a body adapted to bepositively driven and having a peripherally ribbed surface, an annulushaving an internal diameter greater than the external diameter of thebody portion, and provided interiorly with ribs adapted to intercalatewith the ribs on the body portion, the ribs on the body and annulusbeing so constructed that ribs on one element will have a wed 'ng actionbetween adjacent ribs on the ot er-element.

4. A roll for rolling mills having in combination a body portion adaptedto be positively driven and having a peripherally ribbed surface and anannulus having an internal diameter greater than the external diameterof the body portion, and provided interiorly with ribs adapted tointercalate with the ribs on the body portion, means for closing theends of the annulus and means for feedin a lubricant into the annulus.

5. A roll for rolling mills having in combination a body portionprovided at one end with an extended neck and at its opposite end with acollar, and having peri heral ribs, an annulus having an internaliametergreater than the external diameter of the body portion and provided withribs adapted to intercalate with the ribs on the bod ortion, a sleevesurrounding the exten ed neck, and means for shifting the sleevelongitudinally along the neck to hold the annulus against the collar.

- the 6. A roll for rolling mills having in com-- bination a bod portionprovided at one end with an exten ed neck and with a collar at theopposite end and having peripheral ribs, an annulus having an internaldiameter greater than the external diameter of the body ortion andprovided 'with ribs adapte to intercalate with the ribs on the bodyportion, a sleeve movable along the neck of the body portion having aring adapted to bear against an end of the annulus and to press thelatter against. the collar, the ring and collar having a diametergreater than the internal diameter of the annulus, washers interposedbetween the ends of the annulus and the ring and collar respectively,and means for moving the sleeve along the neck.

7. A roll for rolling mills having in combination a bod ortion providedat one end with an ekten e neck and with a collar at the opposite endand having peripheral ribs, an annulus having an internal diameterreater than the external diameteiyof adapted to intercalate with theribs on the body portion, a sleeve movable along the neck of the bodyportion having a ring adapted to bear against an end of the annulus andto press the latter against the collar, the ring and collar having adiameter greater than the internal diameter of the annulus, resilientwashers interposed between the ends of the annulus and the ring andcollar respectively, and means for moving the sleeve along the neck.

ody portion and provided with ribs.

8. A roll for rolling mills having in combination a body portionprovided at one end with an extended neck and with a collar at theopposite end, and having peripheral ribs. an annulus having an internaldiameter greater than the external diameter of the body portion andprovided with ribs adapted to intercalate with the ribs on the bodyportion, a sleeve movable along the neck of the body portion having aring adapted to bear against an end of the annulus and to press thelatter against the collar, the ring and collar having a diameter greaterthan the internal diameter of the annulus, washers interposed betweenthe ends of the annulus and the ring and collar respectively, and meansfor moving the sleeve along the neck, an axial passage extending throughthe neck into the body portion and having a branch passage extendingradially through the body portion and means for forcing a lubricantthrough such passages into the annulus.

9. A roll for rolling mills having in combination a body portion havinga sleeve so connected to the body portion as to rotate therewith and tomove longitudinally thereof, said sleeve being provided with peripheralribs, an annulus having an internal diameter greater than the externaldiameter of the sleeve and provided interiorly with ribs adapted tointercalate with the ribs on the sleeve.

7 In testimony whereof, I have hereunto set my hand.

SAMUEL E. DIESCHER.

Certificate of Correction.

It is hereby certified that the assignce in Letters Patent No.1,478,509, granted December 25, 1923, upon the application of Samuel E.Dieschen of Wilkinsburg, Pennsylvania, for an improvement in Rolls forRolling Mills. was erroneously described and specified as S. Diescher &Sons, a partnership consistin r of Samuel S. Diescher and August P.Diescher, whereas said assignee shonl have been described and specifiedas S. D'ieacher rfv Sons, a partnership consisting of Samuel E.Diesche-r and August P. Diescher, as shown by the record of assignmentsin this office; and that the said Letters Patent should be read withthis correction therein that the same may conform to the record of thecase in the Patent Olfice.

Signed and sealed this 18th day of March, A. D., 1924.

[smn] KARL FENNING,

Acting omm-issioner of Patents.

